PureFlo SKL Series Capsule, Highly Asymmetric Dual Layer PES 0.65μm / 0.2μm PES Sterilizing Grade Hydrophilic Membrane, Internal Filter Length 2.5", S-Size, Filtration Area 1,250 cm2, ¼” - ½” Tapered Hose Barb (Inlet/Outlet), Factory sterilized by ETO